linux-kernel - Re: Early boot regression from f0551af0213 ("x86/topology: Ignore non-present APIC IDs in a present package")

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Date: Thu, 18 Apr 2024 13:20:05 -0400
From: Lyude Paul <lyude@...hat.com>
To: Borislav Petkov <bp@...en8.de>
Cc: Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: Early boot regression from f0551af0213 ("x86/topology: Ignore
 non-present APIC IDs in a present package")

Just gave it a try, unfortunately I'm still seeing the same result on
that branch.

One more piece of information I apparently missed when reporting this
yesterday btw: I noticed one more kernel message that comes before the
panic that's probably relevant:

.TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1

On Thu, 2024-04-18 at 10:27 +0200, Borislav Petkov wrote:
> On Wed, Apr 17, 2024 at 05:21:43PM -0400, Lyude Paul wrote:
> > Hi! I just wanted to let you know that one of the desktops I use
> > for
> > testing no longer seems to boot after this commit (just finished
> > bisecting and confirming). The machine hangs before it gets to
> > fbcon,
> > and the error I'm seeing in the early boot console is as such:
> > 
> >    Kernel panic - not syncing: timer doesn't work through
> > Interrupt-remapped IO-APIC
> >    CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc5Lyude-Test+
> > #20
> >    Hardware name: MSI MS-7A39/A320M GAMING PRO (MS-7A39), BIOS 1.10
> > 01/22/2019
> 
> Looks like an AMD chipset. Thomas did fix some fallout from the topo
> rework on AMD, can you test the tip/master branch pls?
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/
> 
> Thx.
> 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat